The Topix dropped 0.7 percent to 1,639.64 as of 9:13 a.m. in Tokyo, with all but one of its 33 industry groups declining. The Nikkei 225 lost 0.8 percent to 20,245.17. The yen gained 0.4 percent to 138.46 per euro after negotiations in Brussels between Greece and its creditors fell apart after just 45 minutes on Sunday, shifting the burden of finding a resolution to a meeting of euro-area finance ministers set for June 18.